Path: utzoo!attcan!uunet!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!brutus.cs.uiuc.edu!lll-winken!decwrl!shelby!neon!kaufman
From: kaufman@Neon.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.sys.mac.hardware
Subject: Re: questions about newly announced hardware
Message-ID: <1990Mar23.170145.16457@Neon.Stanford.EDU>
Date: 23 Mar 90 17:01:45 GMT
References: <1872@esquire.UUCP> <39763@apple.Apple.COM>
Organization: Computer Science Department, Stanford University
Lines: 18

In article <39763@apple.Apple.COM> anderson@Apple.COM (Clark Anderson) writes:

>The SIMMs in the IIfx are the same style as LaserWriter SIMMs,
>that is, it's a 64-pin connector instead of a 30-pin 
>connector. The difference is the speed. The IIfx requires 80ns,
>all the LaserWriter SIMMs I've seen are 120ns.

I was under the impression that the extra 32 pins on a LaserWriter SIMM were
individual bit-enable lines, and that the extra 32 pins on the 'fx' SIMM are
output data lines.  Is this not true?

How many wait states do the 80ns SIMMs cause, and is there any provision for
using faster memory someday?

(and of course, we all want to know if its possible [for a 3rd party] to
engineer an '040 drop-in replacement for the '030)

Marc Kaufman (kaufman@Neon.stanford.edu)